Rotator Cuff, Shoulder, Arm DMI Therapy Exercise Pulley System Helps ease Tension due to Bursitis, Arthritis, and Tendinitis Syndrome in and around the Shoulder Area. Easy to Assemble Workout System Easy to Assemble, Shoulder Exercise System. Comes with Basic Hardware that fits over the Door. (Over the Door Setup) Effective on Rotator Cuff, Shoulder, Arm, Joints, Aches, Pains Great for the Office, or Home Work Your Joints when You're Ready to.